bootstrap-fileinput上传插件试用

0、效果图

1、引入js、css（建议css放在html头部，js加载在html底部）

<link href="~/Content/fileinput.min.css" rel="stylesheet" />

<script src="~/scripts/jquery-1.10.2.min.js"></script>
<script src="~/scripts/fileinput.js"></script>
<script src="~/scripts/zh.js"></script>

2、html

  <input type="file" id="uploaddoc" name="file" class="file" multiple />//上传按钮 multiple为可多文件上传
  <input type="hidden" id="Doc" name="doc" value="" />//保存文件路径

3、初始化

 $("#uploaddoc").fileinput({
        language: 'zh',
        uploadUrl: '/Form/upload',//后台上传方法
        allowedFileExtensions: ['doc', 'docx'],//上传文件扩展名
        shouUpload: false,
        showRemove: false,
        browseClass: 'btn btn-danger',
        maxFileSize: 5000,
        maxFileNum: 10,
        allowedPreviewTypes: null,
        previewFileIconSettings: {
            'doc': '<i class="fa fa-file-word-o text-muted"></i>'
        },
        previewFileExtSettings: {
            'doc': function (ext) {
                return ext.match(/(doc|docx)$/i);
            }
        }
    });

4、回调方法

 var List = new Array();//声明保存上传文件路径数组对象
    //上传 - 删除
    $('#uploaddoc').on('filesuccessremove', function (event, key) {
        var abort = true;
        if (confirm("确定要删除已上传的文件吗？")) {
            abort = false;
        }
        var index1;
        $.each(List, function (index, item) {
            if (item.KeyID == key) {//默认fileinput.js的key与KeyID不一致，需要改动源码，详情见下文
                index1 = index;
                $.post("/Form/uploaddelete", { key: item.KeyID, path: item.path });//删除以上传到本地的文件
            }
        });
        List.splice(index1, 1);
        var path = "";
        $.each(List, function (index, item) {
            path += item.path;
        });
        $("#Doc").val(path);//修改保存的文件路径
    });
    //取消上传事件，左上角的取消按钮
    $('#uploaddoc').on('filecleared', function (event, files) {
        $.each(List, function (index, item) {
            $.post("/Form/uploaddelete", { key: "all", path: item.path });
        });
        List = new Array();//清空保存的文件路径数组对象，这里是赋值给新的空对象，应该可以优化为删除以保存的所有值
        $("#Doc").val("");
    });

    //上传 - 成功
    $("#uploaddoc").on("fileuploaded", function (event, data, previewId, index) {
        var form = data.form, files = data.files, extra = data.extra,
         response = data.response, reader = data.reader;
        List.push({ path: response.path, KeyID: previewId })
        $("#Doc").val($("#Doc").val() + response.path);
        //$("#Doc").val(List);
    });

5、后台上传方法

//上传方法  

public JsonResult Upload()
        {
            HttpPostedFileBase file = Request.Files["file"];
            if (file == null)
            {
                return Json(new { error = "上传异常" });
            }
            var ext = Path.GetExtension(file.FileName);
            var filename = Path.GetFileNameWithoutExtension(file.FileName);
            var serverfilenname = Guid.NewGuid().ToString("n") + "_" + filename + ext;
            try
            {
                var path = "/File";
                var dic = string.Format("{0}/{1}/{2}/{3}", path, DateTime.Today.Year.ToString(), DateTime.Today.Month.ToString(), DateTime.Today.Day.ToString());
                if (!Directory.Exists(Server.MapPath(dic)))
                {
                    Directory.CreateDirectory(Server.MapPath(dic));
                }
                var webpath = string.Format("{0}/{1}", dic, serverfilenname);
                var serverpath = Path.Combine(Server.MapPath(dic), serverfilenname);
                
                file.SaveAs(serverpath);
                return Json(new {
                    url = "/Form/uploaddelete",//定义要删除的action，没有用到可删掉
                    key = serverfilenname,
                    path = webpath });
            }
            catch (Exception ex)
            {
                return Json(new { error = "上传异常" + ex });
            }
        }

//删除本地文件方法

public JsonResult UpLoadDelete()
        {
            try
            {
                var key = Request.Params["key"];
                var path = Request.Params["path"];
                if (string.IsNullOrEmpty(key) || string.IsNullOrEmpty(path))
                {
                    return Json(false, JsonRequestBehavior.DenyGet);
                }
                path = Server.MapPath(path);
                if (System.IO.File.Exists(path))
                {
                    System.IO.File.Delete(path);
                    return Json(true, JsonRequestBehavior.DenyGet);
                }
                else
                {
                    return Json(false, JsonRequestBehavior.DenyGet);
                }
            }
            catch (Exception)
            {
                return Json(false, JsonRequestBehavior.DenyGet);
            }
        }

6、缺点

尚未研究预览功能

尚有优化空间

7、说明

代码粘贴后可直接使用，后台框架为.net mvc5，默认母版页有加载bootstrap样式和js 如无样式请添加对bootstrap的脚本引用

插件api地址：http://plugins.krajee.com/file-input#events  

上网查了好多相关资料 都不完整，最后只有这个api可以看了，最后终于找到左上角关闭按钮的回调事件

参考博客地址：

http://blog.csdn.net/xumoqiu/article/details/53081352?locationNum=1&fps=1

https://izk.cloud/463/